← Back
Editing: _bootstrap.cpython-38.pyc
U i�fܚ � @ s� d Z dadd� Zdd� Zi Zi ZG dd� de�ZG dd � d �ZG d d � d �Z G d d � d �Z dd� Z dd� Z dd� Z dd�dd�Zdd� Zdd� Zd d � Zd d � ZG d d!� d!�Zddd"�d#d$�Zd^d%d&�Zd'd(�d)d*�Zd+d,� Zd-d.� Zd/d0� Zd1d2� Zd3d4� Zd5d6� Z G d7d8� d8�Z G d9d:� d:�Z G d;d<� d<�Z d=d>� Z d?d@� Z!d_dAdB�Z"dCdD� Z#dEZ$e$dF Z%dGdH� Z&e'� Z(dIdJ� Z)d`dLdM�Z*d'dN�dOdP�Z+dQdR� Z,dadTdU�Z-dVdW� Z.dXdY� Z/dZd[� Z0d\d]� Z1dS )baS Core implementation of import. This module is NOT meant to be directly imported! It has been designed such that it can be bootstrapped into Python as the implementation of import. As such it requires the injection of specific modules and attributes in order to work. One should use importlib as the public-facing version of this module. Nc C s8 dD ] }t ||�rt| |t||�� q| j�|j� dS )z/Simple substitute for functools.update_wrapper.)� __module__�__name__� __qualname__�__doc__N)�hasattr�setattr�getattr�__dict__�update)�new�old�replace� r �9/opt/alt/python38/lib64/python3.8/importlib/_bootstrap.py�_wrap s r c C s t t�| �S �N)�type�sys��namer r r � _new_module# s r c @ s e Zd ZdS )�_DeadlockErrorN)r r r r r r r r 0 s r c @ s8 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd S ) � _ModuleLockz�A recursive lock implementation which is able to detect deadlocks (e.g. thread 1 trying to take locks A then B, and thread 2 trying to take locks B then A). c C s0 t �� | _t �� | _|| _d | _d| _d| _d S �N� )�_thread� allocate_lock�lock�wakeupr �owner�count�waiters��selfr r r r �__init__: s z_ModuleLock.__init__c C s< t �� }| j}t�|�}|d kr$dS |j}||krdS qd S )NFT)r � get_identr � _blocking_on�get)r" �me�tidr r r r � has_deadlockB s z_ModuleLock.has_deadlockc C s� t �� }| t|< z�| j�n | jdks.| j|krT|| _| jd7 _W 5 Q R � W �VdS | �� rhtd| ��| j� d�r�| j d7 _ W 5 Q R X | j� � | j� � qW 5 t|= X dS )z� Acquire the module lock. If a potential deadlock is detected, a _DeadlockError is raised. Otherwise, the lock is always acquired and True is returned. r � Tzdeadlock detected by %rFN) r r$ r% r r r r) r r �acquirer �release�r" r( r r r r+ N s z_ModuleLock.acquirec C sz t �� }| j�b | j|kr"td��| jdks0t�| jd8 _| jdkrld | _| jrl| jd8 _| j� � W 5 Q R X d S )N� cannot release un-acquired lockr r* ) r r$ r r � RuntimeErrorr �AssertionErrorr r r, r- r r r r, g s z_ModuleLock.releasec C s d� | jt| ��S )Nz_ModuleLock({!r}) at {}��formatr �id�r" r r r �__repr__t s z_ModuleLock.__repr__N) r r r r r# r) r+ r, r5 r r r r r 4 s r c @ s0 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd S ) �_DummyModuleLockzVA simple _ModuleLock equivalent for Python builds without multi-threading support.c C s || _ d| _d S r )r r r! r r r r# | s z_DummyModuleLock.__init__c C s | j d7 _ dS )Nr* T)r r4 r r r r+ � s z_DummyModuleLock.acquirec C s$ | j dkrtd��| j d8 _ d S )Nr r. r* )r r/ r4 r r r r, � s z_DummyModuleLock.releasec C s d� | jt| ��S )Nz _DummyModuleLock({!r}) at {}r1 r4 r r r r5 � s z_DummyModuleLock.__repr__N)r r r r r# r+ r, r5 r r r r r6 x s r6 c @ s$ e Zd Zdd� Zdd� Zdd� ZdS )�_ModuleLockManagerc C s || _ d | _d S r )�_name�_lockr! r r r r# � s z_ModuleLockManager.__init__c C s t | j�| _| j�� d S r )�_get_module_lockr8 r9 r+ r4 r r r � __enter__� s z _ModuleLockManager.__enter__c O s | j �� d S r )r9 r, )r" �args�kwargsr r r �__exit__� s z_ModuleLockManager.__exit__N)r r r r# r; r> r r r r r7 � s r7 c C s� t �� zjzt| � }W n tk r0 d}Y nX |dkrptdkrLt| �}nt| �}| fdd�}t� ||�t| < W 5 t �� X |S )z�Get or create the module lock for a given module name. Acquire/release internally the global import lock to protect _module_locks.Nc S s0 t �� zt�|�| kr t|= W 5 t �� X d S r )�_imp� acquire_lock� release_lock� _module_locksr& )�refr r r r �cb� s z _get_module_lock.<locals>.cb) r? r@ rA rB �KeyErrorr r6 r �_weakrefrC )r r rD r r r r: � s r: c C s6 t | �}z |�� W n tk r( Y n X |�� dS )z�Acquires then releases the module lock for a given module name. This is used to ensure a module is completely initialized, in the event it is being imported by another thread. N)r: r+ r r, )r r r r r �_lock_unlock_module� s rG c O s | ||�S )a. remove_importlib_frames in import.c will always remove sequences of importlib frames that end with a call to this function Use it instead of a normal call in places where including the importlib frames introduces unwanted noise into the traceback (e.g. when executing module code) r )�fr< �kwdsr r r �_call_with_frames_removed� s rJ r* )� verbosityc G s6 t jj|kr2| �d�s d| } t| j|� t jd� dS )z=Print the message to stderr if -v/PYTHONVERBOSE is turned on.)�#zimport z# )�fileN)r �flags�verbose� startswith�printr2 �stderr)�messagerK r< r r r �_verbose_message� s rT c s � fdd�}t |� � |S )z1Decorator to verify the named module is built-in.c s& |t jkr td�|�|d��� | |�S )N� {!r} is not a built-in moduler )r �builtin_module_names� ImportErrorr2 �r" �fullname��fxnr r �_requires_builtin_wrapper� s �z4_requires_builtin.<locals>._requires_builtin_wrapper�r )r[ r\ r rZ r �_requires_builtin� s r^ c s � fdd�}t |� � |S )z/Decorator to verify the named module is frozen.c s& t �|�s td�|�|d��� | |�S �Nz{!r} is not a frozen moduler )r? � is_frozenrW r2 rX rZ r r �_requires_frozen_wrapper� s �z2_requires_frozen.<locals>._requires_frozen_wrapperr] )r[ ra r rZ r �_requires_frozen� s rb c C s> t || �}|tjkr2tj| }t||� tj| S t|�S dS )z�Load the specified module into sys.modules and return it. This method is deprecated. Use loader.exec_module instead. N)�spec_from_loaderr �modules�_exec�_load)r" rY �spec�moduler r r �_load_module_shim� s ri c C s� t | dd �}t|d�r8z |�| �W S tk r6 Y nX z | j}W n tk rV Y nX |d k rht|�S z | j}W n tk r� d}Y nX z | j}W n: tk r� |d kr�d� |� Y S d� ||� Y S Y nX d� ||�S d S )N� __loader__� module_repr�?� <module {!r}>�<module {!r} ({!r})>�<module {!r} from {!r}>) r r rk � Exception�__spec__�AttributeError�_module_repr_from_specr �__file__r2 )rh �loaderrg r �filenamer r r � _module_repr s. rw c @ sr e Zd ZdZdddd�dd�Zdd� Zdd � Zed d � �Zej d d � �Zed d� �Z edd� �Z e j dd� �Z dS )� ModuleSpeca� The specification for a module, used for loading. A module's spec is the source for information about the module. For data associated with the module, including source, use the spec's loader. `name` is the absolute name of the module. `loader` is the loader to use when loading the module. `parent` is the name of the package the module is in. The parent is derived from the name. `is_package` determines if the module is considered a package or not. On modules this is reflected by the `__path__` attribute. `origin` is the specific location used by the loader from which to load the module, if that information is available. When filename is set, origin will match. `has_location` indicates that a spec's "origin" reflects a location. When this is True, `__file__` attribute of the module is set. `cached` is the location of the cached bytecode file, if any. It corresponds to the `__cached__` attribute. `submodule_search_locations` is the sequence of path entries to search when importing submodules. If set, is_package should be True--and False otherwise. Packages are simply modules that (may) have submodules. If a spec has a non-None value in `submodule_search_locations`, the import system will consider modules loaded from the spec as packages. Only finders (see importlib.abc.MetaPathFinder and importlib.abc.PathEntryFinder) should modify ModuleSpec instances. N)�origin� loader_state� is_packagec C s6 || _ || _|| _|| _|r g nd | _d| _d | _d S �NF)r ru ry rz �submodule_search_locations� _set_fileattr�_cached)r" r ru ry rz r{ r r r r# V s zModuleSpec.__init__c C sf d� | j�d� | j�g}| jd k r4|�d� | j�� | jd k rP|�d� | j�� d� | jjd�|��S )Nz name={!r}z loader={!r}z origin={!r}z submodule_search_locations={}z{}({})z, ) r2 r ru ry �appendr} � __class__r �join)r" r< r r r r5 b s � �zModuleSpec.__repr__c C sj | j }zH| j|jkoL| j|jkoL| j|jkoL||j koL| j|jkoL| j|jkW S tk rd Y dS X d S r| )r} r ru ry �cached� has_locationrr )r" �other�smslr r r �__eq__l s � �� � �zModuleSpec.__eq__c C s: | j d kr4| jd k r4| jr4td kr&t�t�| j�| _ | j S r )r ry r~ �_bootstrap_external�NotImplementedError� _get_cachedr4 r r r r� x s zModuleSpec.cachedc C s || _ d S r )r )r" r� r r r r� � s c C s$ | j dkr| j�d�d S | jS dS )z The name of the module's parent.N�.r )r} r � rpartitionr4 r r r �parent� s zModuleSpec.parentc C s | j S r )r~ r4 r r r r� � s zModuleSpec.has_locationc C s t |�| _d S r )�boolr~ )r" �valuer r r r� � s ) r r r r r# r5 r� �propertyr� �setterr� r� r r r r rx 1 s $� rx �ry r{ c C s� t |d�rJtdkrt�tj}|dkr0|| |d�S |r8g nd}|| ||d�S |dkr�t |d�r�z|�| �}W q� tk r� d}Y q�X nd}t| |||d�S )z5Return a module spec based on various loader methods.� get_filenameN)ru )ru r} r{ Fr� )r r� r� �spec_from_file_locationr{ rW rx )r ru ry r{ r� �searchr r r rc � s$ � rc c C s8 z | j }W n tk r Y nX |d k r,|S | j}|d krZz | j}W n tk rX Y nX z | j}W n tk r| d }Y nX |d kr�|d kr�z |j}W q� tk r� d }Y q�X n|}z | j}W n tk r� d }Y nX zt| j�}W n tk �r d }Y nX t |||d�}|d k�r"dnd|_ ||_ ||_ |S )N�ry FT) rq rr r rj rt �_ORIGIN� __cached__�list�__path__rx r~ r� r} )rh ru ry rg r �locationr� r} r r r �_spec_from_module� sH r� F��overridec C s� |st |dd �d kr6z | j|_W n tk r4 Y nX |sJt |dd �d kr�| j}|d kr�| jd k r�td krnt�tj}|� |�}| j|_ || _d |_ z ||_ W n tk r� Y nX |s�t |dd �d kr�z | j |_W n tk r� Y nX z | |_W n tk �r Y nX |�s"t |dd �d k�rR| jd k �rRz | j|_W n tk �rP Y nX | j�r�|�srt |dd �d k�r�z | j|_ W n tk �r� Y nX |�s�t |dd �d k�r�| jd k �r�z | j|_W n tk �r� Y nX |S )Nr rj � __package__r� rt r� )r r r rr ru r} r� r� �_NamespaceLoader�__new__�_pathrt rj r� r� rq r� r� ry r� r� )rg rh r� ru r� r r r �_init_module_attrs� s` r� c C sR d}t | jd�r | j�| �}nt | jd�r2td��|dkrDt| j�}t| |� |S )z+Create a module based on the provided spec.N� create_module� exec_modulezBloaders that define exec_module() must also define create_module())r ru r� rW r r r� �rg rh r r r �module_from_spec% s r� c C sj | j dkrdn| j }| jdkrB| jdkr2d�|�S d�|| j�S n$| jrVd�|| j�S d�| j | j�S dS )z&Return the repr to use for the module.Nrl rm rn ro �<module {!r} ({})>)r ry ru r2 r� )rg r r r r rs 6 s rs c C s� | j }t|��� tj�|�|k r6d�|�}t||d��zj| jdkrj| j dkrZtd| j d��t | |dd� n4t | |dd� t | jd�s�| j� |� n | j� |� W 5 tj�| j �}|tj| j < X W 5 Q R X |S )zFExecute the spec's specified module in an existing module's namespace.z module {!r} not in sys.modulesr N�missing loaderTr� r� )r r7 r rd r& r2 rW �popru r} r� r � load_moduler� )rg rh r �msgr r r re G s" re c C s z| j �| j� W n4 | jtjkr@tj�| j�}|tj| j< � Y nX tj�| j�}|tj| j< t|dd �d kr�z | j |_W n tk r� Y nX t|dd �d kr�z(|j |_ t |d�s�| j� d�d |_ W n tk r� Y nX t|dd �d k�rz | |_ W n tk �r Y nX |S )Nrj r� r� r� r rq )ru r� r r rd r� r rj rr r r� r r� rq r� r r r �_load_backward_compatiblee s6 r� c C s� | j d k r t| j d�s t| �S t| �}d| _z�|tj| j< z4| j d kr`| jd krlt d| jd��n | j � |� W n2 ztj| j= W n t k r� Y nX � Y nX tj� | j�}|tj| j< t d| j| j � W 5 d| _X |S )Nr� TFr� r zimport {!r} # {!r})ru r r� r� � _initializingr rd r r} rW r� rE r� rT r� r r r �_load_unlocked� s. r� c C s* t | j�� t| �W 5 Q R � S Q R X dS )z�Return a new module object, loaded by the spec's loader. The module is not added to its parent. If a module is already in sys.modules, that existing module gets clobbered. N)r7 r r� )rg r r r rf � s rf c @ s� e Zd ZdZedd� �Zeddd��Zeddd��Zed d � �Z ed d � �Z ee d d� ��Z ee dd� ��Z ee dd� ��Zee�ZdS )�BuiltinImporterz�Meta path import for built-in modules. All methods are either class or static methods to avoid the need to instantiate the class. c C s d� | j�S )�sReturn repr for the module. The method is deprecated. The import machinery does the job itself. z<module {!r} (built-in)>)r2 r )rh r r r rk � s zBuiltinImporter.module_reprNc C s, |d k r d S t �|�r$t|| dd�S d S d S )Nzbuilt-inr� )r? � is_builtinrc ��clsrY �path�targetr r r � find_spec� s zBuiltinImporter.find_specc C s | � ||�}|dk r|jS dS )z�Find the built-in module. If 'path' is ever specified then the search is considered a failure. This method is deprecated. Use find_spec() instead. N)r� ru )r� rY r� rg r r r � find_module� s zBuiltinImporter.find_modulec C s. |j tjkr"td�|j �|j d��ttj|�S )zCreate a built-in modulerU r )r r rV rW r2 rJ r? �create_builtin)r" rg r r r r� � s �z BuiltinImporter.create_modulec C s t tj|� dS )zExec a built-in moduleN)rJ r? � exec_builtin)r" rh r r r r� � s zBuiltinImporter.exec_modulec C s dS )z9Return None as built-in modules do not have code objects.Nr �r� rY r r r �get_code� s zBuiltinImporter.get_codec C s dS )z8Return None as built-in modules do not have source code.Nr r� r r r � get_source� s zBuiltinImporter.get_sourcec C s dS )z4Return False as built-in modules are never packages.Fr r� r r r r{ s zBuiltinImporter.is_package)NN)N)r r r r � staticmethodrk � classmethodr� r� r� r� r^ r� r� r{ ri r� r r r r r� � s* r� c @ s� e Zd ZdZdZedd� �Zeddd��Zeddd ��Z ed d � �Z ed d � �Z edd� �Z ee dd� ��Zee dd� ��Zee dd� ��ZdS )�FrozenImporterz�Meta path import for frozen modules. All methods are either class or static methods to avoid the need to instantiate the class. �frozenc C s d� | jtj�S )r� r� )r2 r r� r� )�mr r r rk s zFrozenImporter.module_reprNc C s" t �|�rt|| | jd�S d S d S )Nr� )r? r` rc r� r� r r r r� s zFrozenImporter.find_specc C s t �|�r| S dS )z]Find a frozen module. This method is deprecated. Use find_spec() instead. N)r? r` )r� rY r� r r r r� ' s zFrozenImporter.find_modulec C s dS )z*Use default semantics for module creation.Nr )r� rg r r r r� 0 s z FrozenImporter.create_modulec C s@ | j j}t�|�s$td�|�|d��ttj|�}t|| j � d S r_ ) rq r r? r` rW r2 rJ �get_frozen_object�execr )rh r �coder r r r� 4 s � zFrozenImporter.exec_modulec C s t | |�S )z_Load a frozen module. This method is deprecated. Use exec_module() instead. )ri r� r r r r� = s zFrozenImporter.load_modulec C s t �|�S )z-Return the code object for the frozen module.)r? r� r� r r r r� F s zFrozenImporter.get_codec C s dS )z6Return None as frozen modules do not have source code.Nr r� r r r r� L s zFrozenImporter.get_sourcec C s t �|�S )z.Return True if the frozen module is a package.)r? �is_frozen_packager� r r r r{ R s zFrozenImporter.is_package)NN)N)r r r r r� r� rk r� r� r� r� r� r� rb r� r� r{ r r r r r� s. r� c @ s e Zd ZdZdd� Zdd� ZdS )�_ImportLockContextz$Context manager for the import lock.c C s t �� dS )zAcquire the import lock.N)r? r@ r4 r r r r; _ s z _ImportLockContext.__enter__c C s t �� dS )z<Release the import lock regardless of any raised exceptions.N)r? rA )r" �exc_type� exc_value� exc_tracebackr r r r> c s z_ImportLockContext.__exit__N)r r r r r; r> r r r r r� [ s r� c C s@ |� d|d �}t|�|k r$td��|d }| r<d�|| �S |S )z2Resolve a relative module name to an absolute one.r� r* z2attempted relative import beyond top-level packager �{}.{})�rsplit�len� ValueErrorr2 )r �package�level�bits�baser r r � _resolve_nameh s r� c C s" | � ||�}|d krd S t||�S r )r� rc )�finderr r� ru r r r �_find_spec_legacyq s r� c C s t j}|dkrtd��|s&t�dt� | t jk}|D ]�}t� �T z |j}W n6 t k r� t || |�}|dkr|Y W 5 Q R � q4Y nX || ||�}W 5 Q R X |dk r4|� s�| t jk� r�t j| }z |j } W n t k r� | Y S X | dkr�| S | S q4| S q4dS )zFind a module's spec.Nz5sys.meta_path is None, Python is likely shutting downzsys.meta_path is empty) r � meta_pathrW � _warnings�warn� ImportWarningrd r� r� rr r� rq ) r r� r� r� � is_reloadr� r� rg rh rq r r r � _find_specz s6 r� c C sl t | t�s td�t| ����|dk r,td��|dkrTt |t�sHtd��n |sTtd��| sh|dkrhtd��dS )z Verify arguments are "sane".z module name must be str, not {}r zlevel must be >= 0z __package__ not set to a stringz6attempted relative import with no known parent packagezEmpty module nameN)� isinstance�str� TypeErrorr2 r r� rW �r r� r� r r r � _sanity_check� s r� zNo module named z{!r}c C s� d }| � d�d }|r�|tjkr*t||� | tjkr>tj| S tj| }z |j}W n2 tk r� td �| |�}t|| d�d �Y nX t | |�}|d kr�tt�| �| d��nt |�}|r�tj| }t || � d�d |� |S )Nr� r z; {!r} is not a packager � ) r� r rd rJ r� rr �_ERR_MSGr2 �ModuleNotFoundErrorr� r� r )r �import_r� r� � parent_moduler� rg rh r r r �_find_and_load_unlocked� s* r� c C sj t | ��2 tj�| t�}|tkr6t| |�W 5 Q R � S W 5 Q R X |dkr^d�| �}t|| d��t| � |S )zFind and load the module.Nz(import of {} halted; None in sys.modulesr ) r7 r rd r& �_NEEDS_LOADINGr� r2 r� rG )r r� rh rS r r r �_find_and_load� s � r� r c C s* t | ||� |dkr t| ||�} t| t�S )a2 Import and return the module based on its name, the package the call is being made from, and the level adjustment. This function represents the greatest common denominator of functionality between import_module and __import__. This includes setting __package__ if the loader did not. r )r� r� r� � _gcd_importr� r r r r� � s r� �� recursivec C s� |D ]�}t |t�sB|r"| jd }nd}td|� dt|�j� ���q|dkrl|s�t| d�r�t| | j|dd� qt| |�sd �| j|�}zt ||� W q t k r� } z*|j |kr�t j �|t�d k r�W Y �q� W 5 d }~X Y qX q| S ) z�Figure out what __import__ should return. The import_ parameter is a callable which takes the name of module to import. It is required to decouple the function from assuming importlib's import implementation is desired. z.__all__z ``from list''zItem in z must be str, not �*�__all__Tr� r� N)r� r� r r� r r �_handle_fromlistr� r2 rJ r� r r rd r& r� )rh �fromlistr� r� �x�where� from_name�excr r r r� � s, � �r� c C s� | � d�}| � d�}|dk rR|dk rN||jkrNtjd|�d|j�d�tdd� |S |dk r`|jS tjd tdd� | d }d | kr�|�d �d }|S )z�Calculate what __package__ should be. __package__ is not guaranteed to be defined or could be set to None to represent that its proper value is unknown. r� rq Nz __package__ != __spec__.parent (z != �)� )� stacklevelzYcan't resolve package from __spec__ or __package__, falling back on __name__ and __path__r r� r� r )r& r� r� r� r� r� )�globalsr� rg r r r �_calc___package__ s& � �r� r c C s� |dkrt | �}n$|dk r |ni }t|�}t | ||�}|s�|dkrTt | �d�d �S | s\|S t| �t| �d�d � }tj|jdt|j�| � S nt|d�r�t||t �S |S dS )a� Import a module. The 'globals' argument is used to infer where the import is occurring from to handle relative imports. The 'locals' argument is ignored. The 'fromlist' argument specifies what should exist as attributes on the module being imported (e.g. ``from module import <fromlist>``). The 'level' argument represents the package location to import from in a relative import (e.g. ``from ..pkg import mod`` would have a 'level' of 2). r Nr� r� ) r� r� � partitionr� r rd r r r� ) r r� �localsr� r� rh �globals_r� �cut_offr r r � __import__9 s r� c C s& t �| �}|d kr td| ��t|�S )Nzno built-in module named )r� r� rW r� )r rg r r r �_builtin_from_name^ s r� c C s� |a | att�}tj�� D ]H\}}t||�r|tjkr<t}nt �|�rt }nqt ||�}t ||� qtjt }dD ].}|tjkr�t |�} n tj| } t||| � qrdS )z�Setup importlib by importing needed built-in modules and injecting them into the global namespace. As sys is needed for sys.modules access and _imp is needed to load built-in modules, those two modules must be explicitly passed in. )r r� rF N)r? r r rd �itemsr� rV r� r` r� r� r� r r� r ) � sys_module� _imp_module� module_typer rh ru rg � self_module� builtin_name�builtin_moduler r r �_setupe s$ r c C s& t | |� tj�t� tj�t� dS )z0Install importers for builtin and frozen modulesN)r r r� r� r� r� )r r r r r �_install� s r c C s ddl } | a| �tjt � dS )z9Install importers that require external filesystem accessr N)�_frozen_importlib_externalr� r r rd r )r r r r �_install_external_importers� s r )NN)N)Nr )NNr r )2r r� r r rB r% r/ r r r6 r7 r: rG rJ rT r^ rb ri rw rx rc r� r� r� rs re r� r� rf r� r� r� r� r� r� r� �_ERR_MSG_PREFIXr� r� �objectr� r� r� r� r� r� r� r r r r r r r �<module> s^ D% $e -H %*IO / % %#
Save File
Cancel